| Castelli Calepio to Olivenza | 991.40 mi (1,595.51 km) |
| Castelli Calepio to Olot | 438.98 mi (706.47 km) |
| Castelli Calepio to Onate | 633.92 mi (1,020.20 km) |
| Castelli Calepio to Onda | 646.48 mi (1,040.41 km) |
| Castelli Calepio to Onteniente | 713.37 mi (1,148.06 km) |
| Castelli Calepio to Orihuela | 762.61 mi (1,227.29 km) |
| Castelli Calepio to Osuna | 967.20 mi (1,556.55 km) |
| Castelli Calepio to Ourense | 909.89 mi (1,464.32 km) |
| Castelli Calepio to Oviedo | 790.33 mi (1,271.92 km) |
| Castelli Calepio to Paiporta | 677.16 mi (1,089.79 km) |
| Castelli Calepio to Pajara | 1,770.51 mi (2,849.36 km) |
| Castelli Calepio to Palafolls | 450.00 mi (724.20 km) |
| Castelli Calepio to Palafrugell | 422.69 mi (680.26 km) |
| Castelli Calepio to Palamos | 427.21 mi (687.53 km) |
| Castelli Calepio to Palencia | 760.34 mi (1,223.65 km) |
